CVE-2017-6227

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-02-08 · updated 2026-06-17

Description

A vulnerability in the IPv6 stack on Brocade Fibre Channel SAN products running Brocade Fabric OS (FOS) versions before 7.4.2b, 8.1.2 and 8.2.0 could allow an attacker to cause a denial of service (CPU consumption and device hang) condition by sending crafted Router Advertisement (RA) messages to a targeted system.

Affected products

Brocade Fabric OS: before 7.4.2b; 8.0.0, 8.0.1, 8.0.2, 8.1.0, 8.1.1, 8.1.2 — fixed in 7.4.2b
Brocade Fabric Os: 8.0.2b2

How to fix

Upgrade to a fixed version: Brocade Fabric OS 7.4.2b. Check the vendor advisory for mitigations.

References

https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2018-526
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2018-526

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